What it does. Configure rsyslog for centralized log collection with TLS encryption, Part of mukul975/Anthropic-Cybersecurity-Skills (817 security skills) (mukul975/Anthropic-Cybersecurity-Skills).

Install

• npx skills add mukul975/Anthropic-Cybersecurity-Skills --skill implementing-syslog-centralization-with-rsyslog, or copy the skill folder into ~/.claude/skills/implementing-syslog-centralization-with-rsyslog/.
• Raw file: curl -sL https://raw.githubusercontent.com/mukul975/Anthropic-Cybersecurity-Skills/HEAD/skills/implementing-syslog-centralization-with-rsyslog/SKILL.md

SKILL.md (verbatim)

name: implementing-syslog-centralization-with-rsyslog
description: Configure rsyslog for centralized log collection with TLS encryption,
  custom templates, and log rotation, generating server and client configuration
  files with GnuTLS stream drivers, x509 certificate authentication, per-host log
  segregation, and reliable queue settings. Use when building a centralized, encrypted
  syslog pipeline, hardening rsyslog client/server configs for high-availability log
  infrastructure, or troubleshooting TLS-based syslog forwarding.
domain: cybersecurity
subdomain: security-operations
tags:
- syslog
- rsyslog
- log-centralization
- tls-encryption
- log-management
- security-operations
version: '1.0'
author: mahipal
license: Apache-2.0
nist_csf:
- DE.CM-01
- RS.MA-01
- GV.OV-01
- DE.AE-02
mitre_attack:
- T1078
- T1190
- T1059
- T1573
- T1486

Implementing Syslog Centralization with Rsyslog

When to Use

• When deploying or configuring implementing syslog centralization with rsyslog capabilities in your environment
• When establishing security controls aligned to compliance requirements
• When building or improving security architecture for this domain
• When conducting security assessments that require this implementation

Prerequisites

• Familiarity with security operations concepts and tools
• Access to a test or lab environment for safe execution
• Python 3.8+ with required dependencies installed
• Appropriate authorization for any testing activities

Instructions

1. Install dependencies: pip install jinja2 paramiko
2. Generate TLS certificates for rsyslog server and clients using OpenSSL.
3. Run the agent to generate rsyslog server and client configurations:
   • Server: TLS listener on port 6514, per-host directory output, JSON-format templates
   • Client: TLS forwarding with disk-assisted queues for reliability
4. Deploy configurations to servers via SSH (paramiko).
5. Validate TLS connectivity and log delivery.

python scripts/agent.py --server-ip 10.0.0.1 --clients 10.0.0.10,10.0.0.11 --ca-cert ca.pem --output syslog_report.json

Examples

Server Configuration (TLS)

module(load="imtcp" StreamDriver.Name="gtls" StreamDriver.Mode="1"
       StreamDriver.Authmode="x509/name")
input(type="imtcp" port="6514")
template(name="PerHostLog" type="string" string="/var/log/remote/%HOSTNAME%/%PROGRAMNAME%.log")
*.* ?PerHostLog

Client Configuration (Reliable Forwarding)

action(type="omfwd" target="10.0.0.1" port="6514" protocol="tcp"
       StreamDriver="gtls" StreamDriverMode="1"
       StreamDriverAuthMode="x509/name"
       queue.type="LinkedList" queue.filename="fwdRule1"
       queue.maxdiskspace="1g" queue.saveonshutdown="on"
       action.resumeRetryCount="-1")

Other files in this skill

• LICENSE
• references/api-reference.md
• scripts/agent.py

references/api-reference.md (verbatim)

API Reference: Rsyslog Centralization with TLS

Rsyslog Server Configuration Directives

TLS Module Loading

module(load="imtcp"
    StreamDriver.Name="gtls"
    StreamDriver.Mode="1"
    StreamDriver.Authmode="x509/name"
    PermittedPeer=["client1.local","client2.local"])

Global TLS Settings

global(
    DefaultNetstreamDriver="gtls"
    DefaultNetstreamDriverCAFile="/path/to/ca.pem"
    DefaultNetstreamDriverCertFile="/path/to/cert.pem"
    DefaultNetstreamDriverKeyFile="/path/to/key.pem")

Template Syntax

template(name="PerHostDir" type="string"
    string="/var/log/remote/%HOSTNAME%/%PROGRAMNAME%.log")
template(name="JSONFormat" type="string"
    string='{"host":"%HOSTNAME%","msg":"%msg:::json%"}\n')

Rsyslog Client Forwarding

action(type="omfwd" target="<server>" port="6514" protocol="tcp"
    StreamDriver="gtls" StreamDriverMode="1"
    StreamDriverAuthMode="x509/name"
    queue.type="LinkedList" queue.filename="fwdRule1"
    queue.maxdiskspace="1g" queue.saveonshutdown="on"
    action.resumeRetryCount="-1")

Jinja2 Template Engine

from jinja2 import Template
tmpl = Template("target={{ server_ip }} port={{ port }}")
output = tmpl.render(server_ip="10.0.0.1", port=6514)

Paramiko SSH Deployment

import paramiko
client = paramiko.SSHClient()
client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
client.connect(hostname=host, username=user, key_filename=key)
sftp = client.open_sftp()
sftp.file(remote_path, "w").write(content)
client.exec_command("systemctl restart rsyslog")
client.close()

OpenSSL Certificate Generation

openssl req -x509 -newkey rsa:4096 -keyout ca-key.pem -out ca.pem -days 3650 -nodes
openssl req -newkey rsa:2048 -keyout server-key.pem -out server.csr -nodes
openssl x509 -req -in server.csr -CA ca.pem -CAkey ca-key.pem -out server-cert.pem

Back to mukul975/Anthropic-Cybersecurity-Skills (817 security skills) or Agent skills.